====== 'MS-DOS' ======

===== 'echo' without trailing newline  =====

To //echo// a text without the writing of the ending newline (like ''echo -n'' under //POSIX//), type :

''echo | set /p=%%"%%<text>%%"%%''

where ''<text>'' is the text to display.

<note>This commands returns an //errorlevel// of 1, so you have to add ''|| true'' to reset the //errorlevel//.</note>

===== Setting a variable with the result of a command =====

To put the result of a command in an environment variable, type : 

<code batch>
<command> > <file>
- set /p <variable>= < <file>
</code>

where :
  * ''<command>'' is the command from which you want to retrieve the result,
  * ''<variable>'' the name of the environment variable in which you want to store the result of the above command,
  * ''<file>'' : the name of a temporary file which can be deleted afterwards.

===== DOS command return value =====

The return value of a //DOS// command can be retrieved through ''%ERRORLEVEL%''. A value other then ''0'' usually indicates an error.

===== Clipboard =====

Copying to clipboard : ''... | clip''.

There is a way to copy from clipboard, but it involves //PowerShell//.

Also see //[[.:Cygwin:]]// section.

===== Using a command output as input of another command =====

https://ss64.com/nt/for_cmd.html

Example to open the http://q37.info/ web site when ouputed by a //echo// command:

<code dos>
FOR /F %G IN ('echo http://q37.info/') DO start %G
</code>

This work as command line. It seems you have to use ''%%G'' instead of ''%G'' (both times) in a //batch// file (no tested)